Heat exchanger having circulation guide

ABSTRACT

A heat exchanger having a circulation guide, the heat exchanger comprising: a heat exchanger body; an inlet port, which is connected to a bottom end of the heat exchanger body; a discharge port which is connected to a top end of the heat exchanger body; a top body tube installed at a top end of an inside of the heat exchanger body; a bottom end plate installed at a bottom end of the inside of the heat exchanger body; and combustion pipes, which each have a top end connected to pass through a floor surface of the top body tube.

CROSS-REFERENCE TO RELATED APPLICATION

This application is a continuation-in-part of U.S. patent application Ser. No. 15/306,326, filed on Nov. 4, 2016, which is a U.S. National Phase Patent Application of International Patent Application No. PCT/KR2015/003962, filed on Apr. 21, 2015, which claims the benefit of priority to Korean Patent Application No. 10-2014-0047842, filed on Apr. 22, 2014. The disclosures of the above-listed applications are hereby incorporated by reference herein in their entirety.

BACKGROUND

The present invention relates to a heat exchanger having a circulation guide and, more particularly, to a heat exchanger having a circulation guide, which induces circulation to prevent water exchanging heat with a combustion gas at a high temperature from stagnating.

In particular, the present invention relates to a heat exchanger having a circulation guide, which includes a spiral guide disposed on the side of a discharge port to force water to be introduced to a discharge side and a plate-shaped guide disposed on the side of an inlet port to force water to be supplied to the discharge side.

In general, a boiler used in a home, an office, a factory, and various types of public buildings, includes a burner for supplying a heat source (flames and a combustion gas at a high temperature) and a heat exchanger that performs heat-exchanging between the heat source supplied by the burner and water. For example, a boiler disclosed in Korean Patent Laid-open Publication No. 2013-0085090, as illustrated in FIGS. 1 and 2, includes a combustion device 150 having a blower fan 152 and a fuel suction port 153 in addition to a burner 151, and a heat exchanger installed below the combustion device 150.

The heat exchanger includes a boiler casing 110, a water tank 120, a top end plate 121, a bottom end plate 122, and a combustion pipe 130. In this case, water supplied via a direct water supply pipe 112 a passes through the water tank 120 corresponding to a water chamber and then is discharged to a discharge pipe 112 b.

Thus, a heat source, such as flames and a combustion gas at a high temperature, is supplied by the burner 151 connected to a fire chamber 111, and the combustion gas heats water while passing through the combustion pipe 130. The combustion gas of which heat is dissipated due to water, is discharged to the outside via a discharge portion 140.

However, in the above-described related art, while water supplied via the direct water supply pipe 112 a passes through the water tank 120, stagnation, such as an eddy or a counter current, occurs in a particular portion of the water tank 120.

In particular, a wide flow space (a first space portion) is formed in a lower portion of the top end plate 121 that constitutes the fire chamber 111, whereas a narrow flow path (a second space portion) is formed between sidewalls of the fire chamber 111 and the boiler casing 110, so that severe stagnation occurs in a section in which water is introduced from the second space portion to the first space portion.

Thus, when water is excessively heated in a local area where stagnation occurs, water-boiling noise (i.e., boiling noise) occurs, and foreign substances, such as lime, are generated in the stagnation area and are attached thereto, heat-exchanging efficiency with the heat source is lowered, and a wobble phenomenon (i.e., ±temperature difference) of temperature of hot water or heating water being supplied occurs.

DISCLOSURE SUMMARY OF THE INVENTION

The present invention is directed to providing a heat exchanger having a circulation guide, which induces circulation to prevent water exchanging heat with a combustion gas at a high temperature from stagnating.

One aspect of the present invention provides a heat exchanger including a circulation guide, including: a heat exchanger body (210) including therein a water chamber (210 a); a top body tube (220) including therein a fire chamber (220 a), installed at a top end of an inside of the heat exchanger body (210), and including a sidewall (221) of which at least a portion is spaced apart from an inner circumferential surface of the heat exchanger body (210); an inlet port (IN) formed at a bottom end of the heat exchanger body (210) and allowing water to be supplied therethrough to the water chamber 210 a; an outlet port (OUT) connected to a top end of the heat exchanger body (210) and allowing the water that is heated while passing through the water chamber (210 a) to be discharged therethrough; a spiral guide (223) formed at the sidewall (221) of the top body tube (220) in a spiral direction and guiding the water having passed through the water chamber (210 a) to be discharged to the outlet port (OUT) without stagnation; and a plate-shaped guide (250) including a peripheral side flow guide (250-2) penetrated and supported by at least some of a plurality of combustion pipes (240), blocking a portion of the water chamber (210 a) of the heat exchanger body (210) to change flow of the water forcibly, and spaced apart from a floor surface (222) of the top body tube (220) by a distance in a range of 15 mm to 20 mm.

In some embodiments, the plate-shaped guide (250) may further include a central side flow guide (250-1) space apart from the peripheral side flow guide (250-2) in a longitudinal direction of the plurality of combustion pipes (240) and disposed relatively adjacent to the inlet port (IN) than the peripheral side flow guide (250-2) is thereto.

In some embodiments, the central side flow guide (250-1) may be installed to extend from a center of the heat exchanger body (210) outwardly by a predetermined length.

In some embodiments, the peripheral side flow guide (250-2) may be installed to extend from an inner circumferential surface of the heat exchanger body (210) inwardly by a predetermined length.

In some embodiments, the floor surface (222) of the top body tube (220) may be adjacent to the sidewall (221) of the top body tube (220).

In some embodiments, the peripheral side flow guide (250-2) and the floor surface (222) of the top body tube (220) may be disposed in parallel to each other.

In some embodiments, the plurality of combustion pipes (240) may be connected so that a top end of each of the plurality of combustion pipes (240) passes through the floor surface (222) of the top body tube (220) and guide flow of a high-temperature combustion gas introduced through the fire chamber 220 a.

BRIEF DESCRIPTION OF DRAWINGS

FIG. 1 is a cross-sectional view of a boiler according to the related art.

FIG. 2 is a perspective view of a heat exchanger of the boiler according to the related art.

FIG. 3 is a cross-sectional view of a heat exchanger having a circulation guide according to a first embodiment of the present invention.

FIG. 4 is a perspective view of a spiral guide according to the first embodiment of the present invention.

FIG. 5 is a cross-sectional view of a heat exchanger having a circulation guide according to a second embodiment of the present invention.

FIG. 6 is a plan view of a plate-shaped guide according to the second embodiment of the present invention.

FIG. 7 is a front cross-sectional view illustrating a heat exchanger including a circulation guide according to a third embodiment of the present invention.

DETAILED DESCRIPTION OF THE INVENTION

Hereinafter, Hereinafter, a heat exchanger having a circulation guide according to exemplary embodiments of the present invention will be described with the accompanying drawings in detail.

However, hereinafter, a downward type in which a burner is installed at an upper side to spout out flames in a downward direction, will be illustrated, but the present invention may be applied to an upward type, and it is obvious that up and down directions can be freely changed depending on the downward type or the upward type.

First, as illustrated in FIG. 3, in a heat exchanger having a circulation guide according to a first embodiment of the present invention, a spiral guide 223 is illustrated as the circulation guide that prevents stagnation of water.

Meanwhile, the heat exchanger having the circulation guide according to the present invention includes a heat exchanger body 210 having a water chamber 210 a formed inside thereof, a top body tube 220 installed at a top end of the heat exchanger body 210 and having a fire chamber 220 a formed inside thereof, a bottom end plate 230 that closes a bottom end of the heat exchanger body 210, and a combustion pipe 240 through which a combustion gas at a high temperature is discharged.

In particular, the present invention includes the spiral guide 223 disposed at sidewalls 221 of the top body tube 220, unlike in the related art, so that a stagnation phenomenon, such as an eddy or a counter current, is prevented from occurring locally in the water chamber 210 a inside the heat exchanger body 210.

In more detail, the heat exchanger body 210 has the water chamber 210 a that is a space portion in which water flows, formed inside thereof. The heat exchanger body 210 has a cylindrical shape, for example, and the entire inside thereof is used as the water chamber 210 a.

In addition, an inlet port IN through which the supply of water occurs, is installed to be connected to the bottom end of the heat exchanger body 210, and a discharge port OUT through which water is discharged from the water chamber 210 a, is installed to be connected to the top end of the heat exchanger body 210.

Thus, direct water at a low temperature or heating circulation water is introduced into the water chamber 210 a inside the heat exchanger body 210 through the inlet port IN, and the introduced direct water or heating circulation water is heated by heat-exchanging and then is discharged through the discharge port OUT. The water discharged through the discharge port OUT is used as hot water or heating water.

The top body tube 220 is installed at a top end of an inside of the heat exchanger body 210 and covers the top end of the opened heat exchanger body 210. To this end, the top body tube 220 includes cylindrical sidewalls 221 and a floor surface 222 disposed at a lower portion of the top body tube 220.

Thus, the fire chamber 220 a is provided in an inside space of the top body tube 220 surrounded by the sidewalls 221 and the floor surface 222. A burner (see 151 of FIG. 1) is installed at an upper portion of the opened fire chamber 220 a to spout out flames and a combustion gas at a high temperature generated in the burner in a downward direction.

In addition, the sidewalls 221 of the top body tube 220 are spaced apart from each other inwardly from an inner circumferential surface of the heat exchanger body 210. Thus, water introduced into a space therebetween is discharged to the outside through the discharge port OUT.

In addition, the floor surface 222 of the top body tube 220 serves as a top end plate that closes the upper portion of the heat exchanger body 210. A plurality of assembly holes are formed through the floor surface 222 of the top body tube 220 so that a top end of the combustion pipe 240 is inserted into the top body tube 220 through the plurality of assembly holes.

The bottom end plate 230 is installed at a bottom end of the inside of the heat exchanger body 210 and closes the bottom end of the opened heat exchanger body 210.

In addition, a plurality of assembly holes are also formed through the bottom end plate 230 so that a bottom end of the combustion pipe 240 is inserted into the bottom end plate 230 through the plurality of assembly holes.

The number of the assembly holes formed in the bottom end plate 230 is the same as that of the assembly holes formed in the floor surface 222 of a top end plate, and positions thereof are the same as those of the assembly holes formed in the floor surface 222 of the top end plate.

Thus, the combustion pipe 240 is coupled between the floor surface 222 of the top body tube 220 and the bottom end plate 230, which are disposed in parallel in the vertical direction, so that the combustion gas generated in the fire chamber 220 a passes through the combustion pipe 240 and is discharged to the outside.

The combustion pipe 240 is used as a path on which the combustion gas at the high temperature is discharged, and a plurality of combustion pipes 240 are provided to smoothly discharge the combustion gas spouted out to the fire chamber 220 a, and the plurality of combustion pipes 240 are spaced apart from each other and increase a heat-exchanging surface area within the water chamber 210 a.

In this case, top ends of the plurality of combustion pipes 240 are connected to each other to pass through the floor surface 222 of the top body tube 220, and bottom ends of the plurality of combustion pipes 240 are connected to each other to pass through the bottom end plate 230. Thus, the combustion gas at the high temperature introduced via the fire chamber 220 a is discharged, and in this procedure, the combustion gas at the high temperature heat-exchanges with water filled in the water chamber 210 a.

However, heat-exchanging fins (see 130 a of FIG. 2), as known from FIG. 2, are disposed on inner circumferential surfaces of the combustion pipes 240 so as to improve heat-exchanging efficiency between the combustion gas and water.

Meanwhile, as known from (a) and (b) of FIG. 4 in more detail, the spiral guide 223 is installed at inner circumferential surfaces of the sidewalls 221 that constitute the top body tube 220. The spiral guide 223 prevents water from stagnating in the water chamber 210 a inside the heat exchanger body 210.

To this end, the spiral guide 223 is formed at the inner circumferential surfaces of the sidewalls 221 to have a spiral shape that circles in a height direction. In this case, the spiral guide 223 protrudes from the sidewalls 221 inwardly by a predetermined length.

Thus, when water (i.e., direct water or heating circulation water) introduced through the inlet port IN due to an operation of a pump flows in an upward direction and inflow of the water occurs in a narrow flow path formed between the heat exchanger body 210 and the sidewalls 221 of the top end plate, the water spirals due to the spiral guide 223.

In addition, when the water is discharged through the discharge port OUT while spiraling due to the spiral guide 223, flowing water is sucked and drawn from the lower portion of the top body tube 220 so that stagnation, such as an eddy or a counter current, does not occur in the water chamber 210 a of the heat exchanger body 210.

In particular, a wide flow space (a first space portion) is formed in the lower portion of the top body tube 220 that constitutes the fire chamber 220 a, whereas a narrow flow path (a second space portion) is formed between the sidewalls 221 of the top body tube 220 and the heat exchanger body 210. Stagnation of water is prevented even in a point where water flows into the first space portion from the second space portion.

Thus, water-boiling noise is prevented from occurring due to water in a stagnation area excessively heated, or heat-exchanging efficiency is prevented from being lowered due to foreign substances, such as lime, generated in the stagnation area, or a temperature difference is prevented from occurring in hot water or heating water.

However, preferably, ends of the spiral guide 223 in a protrusion direction thereof are in contact with the inner circumferential surface of the heat exchanger body 210. Thus, water passes through the spiral guide 223, and water spirals with a larger force.

Hereinafter, a heat exchanger having a circulation guide according to a second embodiment of the present invention will be described. The heat exchanger having the circulation guide according to the second embodiment of the present invention is characterized by further including a plate-shaped guide in addition to the above-described spiral guide as the circulation guide for preventing stagnation of water.

As illustrated in FIG. 5, the heat exchanger having the circulation guide according to the second embodiment of the present invention also includes a heat exchanger body 210 having a water chamber 210 a, a top body tube 220 having a fire chamber 220 a formed inside thereof, a bottom end plate 230 that closes a bottom end of the heat exchanger body 210, and a combustion pipe 240 through which a combustion gas at a high temperature is discharged.

In addition, the top body tube 220 includes sidewalls 221 and a floor surface 222, and a spiral guide 223 is installed at the sidewalls 221 of the top body tube 220. These configurations are the same as those of the first embodiment of the present invention.

Thus, direct water or heating circulation water supplied to the water chamber 210 a inside the heat exchanger body 210 through an inlet port IN passes through an inside of the water chamber 210 a and is discharged through a discharge port OUT. During discharge, stagnation of water is prevented by the spiral guide 223.

Furthermore, flames and the combustion gas spout out via a burner connected to the top body tube 220, and the combustion gas is discharged to the outside through the combustion pipe 240. Thus, direct water or heating circulation water supplied to the water chamber 210 a heat-exchanges with the flames and the combustion gas and is heated, and heated water is supplied as hot water or heating water.

Meanwhile, the heat exchanger having the circulation guide according to the second embodiment of the present invention further includes a plate-shaped guide 250, and the plate-shaped guide 250 is assembled to be passed through by the combustion pipe 240 inside the heat exchanger body 210 and closes a part of the water chamber 210 a of the heat exchanger body 210 to force the flow of water to be changed.

The purpose of forcing the flow of water to be changed by the plate-shaped guide 250 is, firstly, to prevent stagnation of water from occurring locally in a particular area of the water chamber 210 a, and secondly, to allow water to be uniformly distributed into the water chamber 210 a to improve heat-exchanging efficiency.

Thus, one or a plurality of plate-shaped guides 250 capable of achieving at least the two purposes may be used, and an installation position thereof is also properly selected according to the shape of the heat exchanger body 210.

However, it is obvious that a plurality of plate-shaped guides 250 are used rather than one plate-shaped guide 250 so that the above two purposes will be more securely satisfied. Thus, the plate-shaped guide 250 includes a plurality of sub-guides 250-1 and 250-2, and the plurality of sub-guides 250-1 and 250-2 are installed in the heat exchanger body 210 in a height direction to be spaced apart from each other.

In FIG. 5, the plate-shaped guide 250 includes two sub-guides 250-1 and 250-2. The two sub-guides 250-1 and 250-2 include a central side flow guide 250-1 and a peripheral side flow guide 250-2.

The central side flow guide 250-1 is installed to extend from the center of the heat exchanger body 210 outwardly by a predetermined length. Thus, water flows through an outside periphery of the water chamber 210 a having no central side flow guide 250-1 formed inside thereof.

To this end, as shown (a) of FIG. 6, the central side flow guide 250-1 has a shape of a disc having a smaller diameter than that of the water chamber 210 a, and a plurality of first assembly holes 250-1 a through which combustion pipes 240 are inserted into and assembled to the central side flow guide 250-1, are formed in the central side flow guide 250-1. The number and position of the plurality of first assembly holes 250-1 a are the same as those of the combustion pipes 240 that pass through the central side flow guide 250-1 among the plurality of combustion pipes 240.

In addition, the peripheral side flow guide 250-2 is installed to extend from an inner circumferential surface of the heat exchanger body 210 inwardly by a predetermined length. Thus, water flows through a central side 250-2 b of the water chamber 210 a having no peripheral side flow guide 250-2 formed inside thereof.

To this end, as shown in (b) of FIG. 6, the peripheral side flow guide 250-2 has a shape of a disc having the same diameter as that of the water chamber 210 a, and a plurality of second assembly holes 250-2 a through which the combustion pipes 240 are inserted into the peripheral side flow guide 250-2, are formed in the periphery of the peripheral side flow guide 250-2. In addition, a flow hole 250-2 b through which water passes, is formed in the center of the peripheral side flow guide 250-2. However, preferably, the above-described peripheral side flow guide 250-2 is installed above the central side flow guide 250-1.

When water passes through the periphery of the water chamber 210 a due to the central side flow guide 250-1 disposed below the peripheral side flow guide 250-2 and then passes through the center (i.e., the flow hole) of the peripheral side flow guide 250-2 disposed above the central side flow guide 250-1, water circulates, and a direction of water changes into the periphery of the water chamber 210 a. This is because water is naturally guided to a portion where the spiral guide 223 is installed.

As described above, the plate-shaped guide 250 causes a change in the flow of water supplied by a pump so that stagnation of water is prevented from occurring in a local area of the water chamber 210 a.

Furthermore, as water spirals due to the spiral guide 223 installed at the discharge port OUT, in a state in which a suction force is applied to water below the spiral guide 223, the plate-shaped guide 250 installed at the inlet port IN guides water to the spiral guide 223. Thus, stagnation of water is further prevented.

INDUSTRIAL APPLICABILITY

Hereinafter, a heat exchanger including a circulation guide according to a third embodiment of the present invention will be described with reference to FIG. 7.

The heat exchanger including the circulation guide according to the third embodiment of the present invention includes a heat exchanger body 210, an inlet port IN, an outlet port OUT, a top body tube 220, a spiral guide 223, a combustion pipe 240, and a plate-shaped guide 250.

A water chamber 210 a is provided in the heat exchanger body 210.

The inlet port IN is formed on an outer periphery of a bottom end of the heat exchanger body 210, so that water is supplied into the water chamber 210 a of the heat exchanger.

The outlet port OUT is formed on an outer periphery of an upper end of the heat exchanger body 210, so that water having passed through the water chamber 210 a is discharged. Specifically, the outlet port OUT and the inlet port IN may be disposed to be spaced apart from each other in an outer circumferential direction of the heat exchanger body 210.

At least a portion of the top body tube 220 is installed by being inserted to an upper end portion of the heat exchanger body 210. In addition, a fire chamber 220 a is formed inside the top body tube 220. In addition, an end of the top body tube 220 is supported at an upper end of the heat exchanger body 210, and a region of an outer periphery of the top body tube 220 may be spaced apart from an inner circumferential surface of the heat exchanger body 210.

Specifically, a heat source such as a flame and high-temperature combustion gas is supplied to the fire chamber 220 a.

A spiral guide 223 is installed at an outer periphery of the top body tube 220 to guide water introduced through the inlet port IN to be discharged to the outlet port OUT without stagnation. Specifically, the spiral guide 223 may be spirally disposed along a circumferential direction of the top body tube 220 on a sidewall 22 f 1 of the top body tube 220 spaced apart from the inner circumferential surface of the heat exchanger body 210.

For example, the spiral guide 223 may protrude from the sidewall 221 of the top body tube 220. Accordingly, when the top body tube 220 is installed at the heat exchanger body 210, the top body tube 220 in which the spiral guide 223 is installed may be easily assembled.

That is, the water introduced into the water chamber 210 a may spirally move along the spiral guide 223 to move to the outlet port OUT. In other words, when the water introduced from the inlet port IN which is formed at a lower position than the outlet port OUT whirls to be discharged through the outlet port OUT, it serves to suck in and draw in the water flowing below the top body tube 220, thereby preventing stagnation such as vortex or countercurrent from occurring in the water chamber 210 a of the heat exchanger body 210.

A plurality of combustion pipes 240 are spaced apart from each other in the heat exchanger body 210 and are disposed below a floor surface 222 of the top body tube 220. In addition, the combustion pipe 240 communicates with the fire chamber 220 a of the top body tube 220 to guide the flame and high-temperature combustion gas to move. That is, a plurality of assembling holes are formed in the floor surface 222 of the top body tube 220 so that a top end of the combustion pipe 240 is fitted and assembled thereto.

Specifically, the combustion pipe 240 is disposed in the water chamber 210 a in a direction parallel to the heat exchanger body 210. Accordingly, water introduced through the inlet port IN may be heated through heat exchange with the flame or combustion gas passing through the combustion pipe 240.

A plate-shaped guide 250, as illustrated in FIG. 6, may be formed in the same manner as the plate-shaped guide 250 of 250 including the circulation guide according to the second embodiment of the present invention described above.

The plate-shaped guide 250 may be assembled so that the combustion pipe 240 passes therethrough and may block a portion of the water chamber 210 a of the heat exchanger body 210 to forcibly change the flow of water and prevent stagnation of water in a specific area within the water chamber 210 a.

In addition, the plate-shaped guide 250 may be spaced apart from the floor surface 222 of the top body tube 220 along a longitudinal direction of the combustion pipe 240. Specifically, the plate-shaped guide 250 may include a plurality of sub-guides 250-1 and 250-2, and the plurality of sub-guides 250-1 and 250-2 may be spaced apart from each other in the water chamber 210 a.

One of the plurality of sub-guides 250-1 and 250-2 that is adjacent to the floor surface 222 of the top body tube 220 is spaced apart from the floor surface 222 of the top body tube 220 by a distance D in a range of 15 mm to 20 mm.

When the distance between the floor surface 222 of the top body tube 220 and the sub-guides 250-1 and 250-2 exceeds 20 mm, there is a problem in that a boiling noise (e.g., water boiling noise) may occur because water is excessively heated in a local region due to stagnation of the water in the water chamber 210 a.

In addition, when the distance between the floor surface 222 of the top body tube 220 and the sub-guides 250-1 and 250-2 is less than 15 mm, there is a problem in that the distance between the floor surface 222 of the top body tube 220 and the sub-guides 250-1 and 250-2 is too narrow and it is difficult to expect an effect according to the original installation purpose of the sub-guides 250-1 and 250-2. Specifically, when the distance between the floor surface 222 of the top body tube 220 and the sub-guides 250-1 and 250-2 is less than 15 mm, there is a problem in that a space between an upper portion of the sub-guides 250-1 and 250-2 and the floor surface 222 of the top body tube 220 is too narrow, thus obstructing the flow of water, and the water passing therethrough may be locally heated.

With such a configuration, the heat exchanger including the circulation guide according to the third embodiment of the present invention may effectively reduce noise generated by excessive heating of water in a local area that may occur due to stagnation of water in the water chamber 210 a. In the heat exchanger including the circulation guide according to the third embodiment of the present invention, the problem of a decrease in heat exchange efficiency which may occur as lime is generated inside the heat exchanger due to water stagnation may be effective reduced.

In addition, the plurality of sub-guides 250-1 and 250-2 may include a central side flow guide 250-1 and a peripheral side flow guide 250-2.

The peripheral side flow guide 250-2 adjacent to the floor surface 222 of the top body tube 220 may be spaced apart from the floor surface 222 of the top body tube 220 by a distance D in a range of 15 mm to 20 mm. Specifically, the peripheral side flow guide 250-2 may disposed to have a distance in a range of 15 mm to 20 mm from a surface of the floor surfaces 222 of the top body tube 220 that is adjacent to the sidewall 221 of the top body tube 220.

Specifically, the peripheral side flow guide 250-2 and the floor surface 222 of the top body tube 220 may be arranged in parallel (e.g., side by side).

The central side flow guide 250-1 may be spaced apart from the peripheral side flow guide 250-2 in a longitudinal direction of the combustion pipe 240. In addition, the central side flow guide 250-1 may be penetrated and supported by the combustion pipe 240 to include at least an area that is not covered by the peripheral side flow guide 250-2, thereby changing the flow of water in the water chamber 210 a and preventing water stagnation.

Specifically, the central side flow guide 250-1 may be disposed relatively adjacent to the inlet port IN than the peripheral side flow guide 250-2 is thereto.

In addition, the heat exchanger including the circulation guide according to the third embodiment of the present invention may include a bottom end plate 230 included in the heat exchanger including the circulation guide according to the first and second embodiments described above.

In addition, configurations of the heat exchanger including the circulation guide according to the third embodiment of the present invention that have the same reference numerals as those of the heat exchanger including the circulation guide according to the second embodiment of the present invention may be provided for the same configuration and for the same purpose except a position of the inlet port IN, a shape of the floor surface 222 of the top body tube 220, and a specific distance between the top body tube 220 and the peripheral side flow guide 250-2 of the heat exchanger including the circulation guide according to the second embodiment of the present invention.

Hereinafter, flow of water in the heat exchanger including the circulation guide according to an embodiment of the present invention will be described with reference to FIG. 7.

The water introduced into the water chamber 210 a from the inlet port IN is heated while heat is exchanged by the combustion pipe 240 and moves through an outer periphery of the water chamber 210 a without the central side flow guide 250-1.

In addition, the flow of water changes while the water passes through a region without the central side flow guide 250-1 in the water chamber 210 a, and the water moves through a flow hole 250-2 b formed in the peripheral side flow guide 250-2.

In addition, the water having passed through the flow hole 250-2 b moves toward a direction of the sidewall 221 of the top body tube 220 through a space between the peripheral side flow guide 250-2 and the floor surface 222 of the top body tube 220. That is, the water having passed through the flow hole 250-2 b may pass through the distance in a range of 15 mm to 20 mm between the peripheral side flow guide 250-2 and the floor surface 222 of the top body tube 220 to move toward the sidewall 221 of the top body tube 220.

In addition, the water moves into a space between the sidewall 221 of the top body tube 220 and an inside of the heat exchanger body 210.

In such a case, the water spirally moves along an outer circumferential surface of the top body tube 220 by the spiral guide 223 and is discharged through the outlet port OUT. Specifically, the spiral guide 223 may guide the water to move spirally along the outer circumferential surface of the top body tube 220 having a relatively higher temperature than the combustion pipe 240, thereby preventing stagnation of the water and effectively providing a path for heat exchange of the water.

That is, the spiral guide 223 may prevent stagnation of the heated water discharged through the outlet port OUT, thereby effectively reducing noise generated by water being boiled locally. In addition, the spiral guide 223 may effectively provide a path for heating water through heat exchange with the flame or high-temperature combustion gas introduced into the fire chamber 220 a.

Hereinafter, with reference to the accompanying drawings, the embodiments of the present invention will be described in detail so that those of ordinary skill in the art to which the present invention pertains can easily implement them. The present invention may be embodied in many different forms and is not limited to the embodiments described herein.

It is noted that the drawings are schematic and not drawn to scale. Relative dimensions and proportions of parts in the drawings are shown exaggerated or reduced in size for clarity and convenience in the drawings, and any dimensions are illustrative only and not limiting. And the same reference numerals are used to indicate like features to the same structural element or part appearing in two or more drawings.

The embodiment of the present invention specifically represents an ideal embodiment of the present invention. As a result, various modifications of the diagram are expected. Therefore, the embodiment is not limited to a specific shape of the illustrated area, and includes, for example, a shape modification by manufacturing.

REFERENCE NUMERAL

-   210: Heat exchanger body -   210 a: Water chamber -   220: Top body tube -   220 a: Fire chamber -   221: Sidewall -   222: Floor surface -   223: Spiral guide -   230: Bottom end plate -   240: Combustion pipe -   250: Plate-shaped guides -   250-1: Central side flow guide -   250-2: Peripheral side flow guide 

What is claimed is:
 1. A heat exchanger including a circulation guide, the heat exchanger comprising: a heat exchanger body including therein a water chamber; a top body tube including therein a fire chamber, installed at a top end of an inside of the heat exchanger body, and including a sidewall of which at least a portion is spaced apart from an inner circumferential surface of the heat exchanger body; an inlet port formed at a bottom end of the heat exchanger body and allowing water to be supplied therethrough to the water chamber; an outlet port connected to a top end of the heat exchanger body and allowing the water that is heated while passing through the water chamber to be discharged therethrough; a spiral guide formed at the sidewall of the top body tube in a spiral direction and guiding the water having passed through the water chamber to be discharged to the outlet port without stagnation; and a plate-shaped guide including a peripheral side flow guide penetrated and supported by at least some of a plurality of combustion pipes, blocking a portion of the water chamber of the heat exchanger body to change flow of the water forcibly, and spaced apart from a floor surface of the top body tube by a distance in a range of 15 mm to 20 mm.
 2. The heat exchanger including the circulation guide of claim 1, wherein the plate-shaped guide further includes a central side flow guide space apart from the peripheral side flow guide in a longitudinal direction of the plurality of combustion pipes and disposed relatively adjacent to the inlet port than the peripheral side flow guide is thereto.
 3. The heat exchanger including the circulation guide of claim 2, wherein the central side flow guide is installed to extend from a center of the heat exchanger body outwardly by a predetermined length.
 4. The heat exchanger including the circulation guide of claim 3, wherein the peripheral side flow guide is installed to extend from an inner circumferential surface of the heat exchanger body inwardly by a predetermined length.
 5. The heat exchanger including the circulation guide of claim 1, wherein the floor surface of the top body tube is adjacent to the sidewall of the top body tube.
 6. The heat exchanger including the circulation guide of claim 1, wherein the peripheral side flow guide and the floor surface of the top body tube are disposed in parallel to each other.
 7. The heat exchanger including the circulation guide of claim 1, wherein the plurality of combustion pipes are connected so that a top end of each of the plurality of combustion pipes passes through the floor surface of the top body tube and guide flow of a high-temperature combustion gas introduced through the fire chamber. 